The yen rallied on a safe haven bid following the resignation of Gary Cohn, the head of the National Economic Council, a hitherto key figure in Trump’s administration over what many White House watchers say is over Trump’s sudden push toward trade protectionism. The news broke after the Wall Street close yesterday, and has sent S&P 500 futures down over 1% in overnight trading, foreshadowing an sharp drop at the open of regular trading later today.